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ASTR 1402 Pearson 1...

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Sunspots are cooler than the surrounding gas in the photosphere because

strong magnetic fields slow convection and prevent hot plasma from entering the region.

Which of the following processes is involved in the sunspot cycle? the winding up of magnetic field lines inside the Sun due to its differential rotation Which of the following best explains why nuclear fusion requires bringing nuclei extremely close together? Nuclei normally repel because they are all positively charged and can be made to stick only when brought close enough for the strong force to take hold. Which of the following years had the least sunspot activity?

1987 What is the approximate range in latitude over which sunspots appear? Sunspots appear over a range of 40-50∘∘N latitude to 40-50∘∘S latitude. According to the figure, how do the positions of sunspots appear to change during one sunspot cycle? Do they get closer to or farther from the equator with time? Sunspots get closer to the equator during a sunspot cycle. From center outward, which of the following lists the "layers" of the Sun in the correct order? core, radiation zone, convection zone, photosphere, chromosphere, corona What is the approximate temperature of the Sun's core? 15 million K The arrows in this diagram are meant to show how gravitational equilibrium works in the Sun. What do the different colors and different arrow lengths represent? Green arrows represent gravity; red arrows represent pressure; longer arrows represent a stronger push or pull.

What layer of the Sun are we seeing in this photo? Photosphere

The dark spots in this photo (such as the one indicated by the arrow) represent what we call _____________. Sunspots

Which photo pair shows Earth correctly scaled in comparison to the Sun?

The tiniest earth that looks like a speck This photograph shows a small portion of the Sun's photosphere. What is going on in the bright regions (such as the bright region indicated by the arrow)? Hot gas is rising up from the solar interior....